Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 395, Issue -, Pages 183-189Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2011.12.029
Keywords
Surface molecular imprinting technique; Polypyrrole/TiO2 nanocomposite; Methyl orange; Photocatalytic activity; Simulated solar light
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Funding
- Natural Science Foundation of China [50978132, 51178213, 51008149]
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Conductive polypyrrole/TiO2 nanocomposites were successfully prepared by surface molecular imprinting technique (MIP-PPy/TiO2) using methyl orange as template molecule. The samples were characterized by means of SEM, XRD, BET and UV-vis diffuse reflectance spectroscopy. Compared with conductive polypyrrole/TiO2 nanocomposites which were prepared by in situ method (Control-PPy/TiO2), the absorption edge of MIP-PPy/TiO2 red-shifts 10 nm, indicating that the band gap energy of MIP-PPy/TiO2 is narrower than Control-PPy/TiO2. Moreover, MIP-PPy/TiO2 nanocomposites show higher adsorption capacity and selectivity for template molecule than Control-PPy/TiO2 nanocomposites, and the photocatalytic activity of MIP-PPy/TiO2 is two times of Control-PPy/TiO2, which is attributed to the introduction of the imprinted cavities on the surface of MIP-PPy/TiO2 nanocomposites. Therefore, surface molecular imprinting method may be considered as a novel technology for the preparation of PPy/TiO2. (C) 2011 Elsevier B.V. All rights reserved.
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